-Immigration brings entrepreneurs who start new businesses that hire American workers.

-Immigration brings young workers who help offset the large-scale retirement of baby boomers.

-Immigration brings diverse skill sets that keep our workforce flexible, help companies grow, and increase the productivity of American workers.

-Immigrants are far more likely to work in innovative, job-creating fields such as science, technology, engineering, and math that create life-improving products and drive economic growth.

Immigration undoubtedly has economic costs as well, particularly for Americans in certain industries and Americans with lower levels of educational attainment. But the benefits that immigration brings to society far outweigh their costs, and smart immigration policy could better maximize the benefits of immigration while reducing the costs.

An internal Department of Homeland Security assessment obtained by The Washington Post shows the agency has already found 33,000 more detention beds to house undocumented immigrants, opened discussions with dozens of local police forces that could be empowered with enforcement authority and identified where construction of Trump’s border wall could begin.

The agency also is considering ways to speed up the hiring of hundreds of new Customs and Border Patrol officers, including ending polygraph and physical fitness tests in some cases, according to the documents.

“This is an administration that very much is interested in setting up that mass deportation infrastructure and creating the levers of a police state,” said Marielena Hincapié, executive director of the National Immigration Law Center. “In these documents, you have more proof and evidence that they’re planning to carry it out.”

There is some hope that Congress or DHS lead John Kelley will prevail.

But these plans could be held up by the prohibitive costs outlined in the internal report and resistance in Congress, where many lawmakers are already balking at approving billions in spending on the wall and additional border security measures.

Gillian Christensen, DHS’s acting spokeswoman, said the agency would not comment on what she called “pre-decisional documents.”

Although Homeland Security Secretary John F. Kelly has said DHS is not pursuing mass deportations, Trump’s executive orders broadly expanded the pool of undocumented immigrants who are deemed a priority for removal.

But several studies, over many years, have concluded that immigrants are less likely to commit crimes than people born in the United States. And experts say the available evidence does not support the idea that undocumented immigrants commit a disproportionate share of crime.

One study given here.But sure to look at the plots at the end of the link about.

ABSTRACTThe perception that immigration adversely affects crime rates led to legislation in the 1990s that particularly increased punishment of criminal aliens. In fact, immigrants have much lower institutionalization (incarceration) rates than the native born - on the order of one-fifth the rate of natives. More recently arrived immigrants have the lowest relative incarceration rates, and this difference increased from 1980 to 2000. We examine whether the improvement in immigrants' relative incarceration rates over the last three decades is linked to increased deportation, immigrant self-selection, or deterrence. Our evidence suggests that deportation does not drive the results. Rather, the process of migration selects individuals who either have lower criminal propensities or are more responsive to deterrent effects than the average native.